package com.leyou.item.service.impl;

import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.leyou.common.exception.LyException;
import com.leyou.item.dto.SpecGroupDTO;
import com.leyou.item.dto.SpecParamDTO;
import com.leyou.item.entity.SpecGroup;
import com.leyou.item.mapper.SpecGroupMapper;
import com.leyou.item.service.SpecGroupService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.util.CollectionUtils;

import java.util.List;
import java.util.Map;
import java.util.stream.Collectors;

@Service
public class SpecGroupServiceImpl extends ServiceImpl<SpecGroupMapper,SpecGroup> implements SpecGroupService {
@Autowired
SpecParamServiceImpl specParamService;
    @Override
    public List<SpecGroupDTO> querySpecList(Long categoryId) {
        //查询规格组
        List<SpecGroup> category_id = query().eq("category_id", categoryId).list();
        List<SpecGroupDTO> specGroupDTOS = SpecGroupDTO.convertEntityList(category_id);
        if (CollectionUtils.isEmpty(specGroupDTOS)){
            throw  new LyException(404,"该分类下的规格组不存在");
        }
        //查询规格参数

        List<SpecParamDTO> list = specParamService.queryParams(categoryId, null, null);
        //对规格参数分组 id一直的在一起
        Map<Long, List<SpecParamDTO>> collect = list.stream().collect(Collectors.groupingBy(SpecParamDTO::getGroupId));
        //把参数放入group中
        for (SpecGroupDTO specGroupDTO : specGroupDTOS) {
            specGroupDTO.setParams(collect.get(specGroupDTO.getId()));
        }


        return specGroupDTOS;
    }
}
